WO2019015155A1 - 一种可开合谐波电流的直流隔离开关 - Google Patents
一种可开合谐波电流的直流隔离开关 Download PDFInfo
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- WO2019015155A1 WO2019015155A1 PCT/CN2017/107718 CN2017107718W WO2019015155A1 WO 2019015155 A1 WO2019015155 A1 WO 2019015155A1 CN 2017107718 W CN2017107718 W CN 2017107718W WO 2019015155 A1 WO2019015155 A1 WO 2019015155A1
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- contact
- auxiliary
- arc extinguishing
- moving
- static contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
Definitions
- Embodiments of the present invention relate to a DC isolation switch that can open and close harmonic currents in the field of high voltage transmission.
- the DC isolation switch as an air break has a specific structure as shown in FIG. 1 : a main static contact 11 and a movable end member having an active contact 12, and the movable end member further includes two foldable ones for driving the active touch.
- the conductive rod 13 reciprocatingly moves, when the switch is closed, the operating mechanism drives the two conductive rods 13 to be unfolded, and the active contact is closed with the main static contact by the conductive rod; when the opening is opened, the operating mechanism drives two The conductive rods 13 are folded and folded, and the active contacts are driven by the conductive rods to open with the main static contacts.
- the main function of the existing high-voltage DC isolation switch is to provide electrical isolation to high-voltage electrical equipment under no-load conditions, so the DC isolation switch does not have the ability to break current.
- the DC isolation switch installed on the high voltage side of the DC filter is required to have the ability to interrupt the harmonic current, so that the DC filter can be switched on and off.
- the DC isolation switch opening and closing harmonic currents at home and abroad generally adopt an auxiliary arc angle device, and an arc ignition device is installed on the DC isolation switch. When the harmonic current is interrupted, the harmonic current ablation auxiliary contact is formed. The arc breaks the arc through the air to open and close the harmonic current.
- the transmission distance of UHV DC transmission project will be greatly improved in the future, in order to better configure Resources, improving transmission efficiency and line utilization, and increasing transmission capacity are economical methods.
- Increasing the rated current of the system or increasing the system voltage will effectively increase the transmission power.
- the DC current of the DC isolation switch installed on the high voltage side of the filter must also increase.
- the auxiliary arc angle device in the prior art can not meet the opening and closing harmonics. Current requirements. Therefore, it is necessary to design a device capable of ensuring that the isolation switch has the ability to break harmonic current when the current is increased.
- embodiments of the present invention are expected to provide a plug-in DC-isolated switch capable of opening and closing harmonic currents with an auxiliary arc extinguishing circuit.
- a DC isolating switch capable of opening and closing harmonic currents, comprising a main static contact and a moving end component, the moving end component comprising: closing with the main static contact by moving forward, moving backward and opening with the main static contact
- the active contact the isolating switch further comprises an arc extinguishing device, wherein the arc extinguishing device comprises an auxiliary moving contact and a lever arranged on the moving end member for the follower end member, and the arc extinguishing device further comprises an operating handle
- the arc extinguishing chamber and the auxiliary static contact disposed on the front and rear moving paths of the auxiliary moving contact, the auxiliary static contact is connected in parallel with the main static contact through the arc extinguishing chamber, and the auxiliary moving contact and the shifting rod follow the moving end member
- the auxiliary moving contact and the auxiliary static contact are contacted before the arc extinguishing chamber is closed by the toggle lever operating handle, and are separated after the active contact and the main static contact are contacted,
- the moving end component further includes a conductive rod that drives the movement of the active contact, the shifting rod is arranged along a radial direction of the conductive rod, and the auxiliary moving contact is a plate-shaped structure disposed perpendicularly or obliquely with the operating rod, and the auxiliary moving contact
- the one side plate surface is a moving contact contact surface for sliding contact with the auxiliary static contact in the front-rear direction.
- the lever and the auxiliary moving contact are both disposed on the hoop, and the hoop is fixed to the On the conductive rod.
- the auxiliary static contact has a static contact contact surface which is disposed obliquely downward from the rear to the front for sliding contact with the movable contact contact surface in the front-rear direction.
- the operating handle includes a shank extending in the left-right direction of the swing axis and a dial disposed on the shank, the dial having a front dialing surface and a rear dial for contacting the lever to realize the dialing by the lever
- the moving surface, the position of the dial relative to the shank in the front and rear direction is adjustable.
- a plurality of adjusting long holes for adjusting the position of the dial relative to the shank are arranged side by side on the dial block, and the adjusting long hole is provided with a bolt for fixing the dial block to the shank.
- the front dialing surface and the rear dialing surface are located on adjacent sides of the dial block, and the front dialing surface and the rear dialing surface are arranged in a V shape.
- the front dialing surface is formed by the rear side of the dial block, and the rear dialing surface is formed by the lower side of the dial block, and the length of the front dialing surface is greater than the length of the rear dialing surface.
- the arc extinguishing chamber is solid-sealed in the solid-sealed pole, and the isolating switch further comprises a vertical insulating support arranged in parallel with the solid-sealed pole, and the lower end of the solid-sealed pole and the vertical insulating support is disposed on the connecting frame
- the spring mechanism of the arc extinguishing chamber is laterally disposed at an upper end of the solid sealing pole and the vertical insulating support.
- the upper end of the solid-sealed pole and the vertical insulating support are connected with an auxiliary contact bracket, the auxiliary static contact is disposed on the right side of the auxiliary contact bracket, and the operating handle is located on the right side of the spring mechanism.
- the DC disconnecting switch capable of opening and closing harmonic currents includes a main static contact and a moving end member, and the moving end member includes closing with the main stationary contact by moving forward.
- the active contact that is moved backward and is separated from the main static contact the isolating switch further includes an arc extinguishing device, and the arc extinguishing device includes an auxiliary moving contact disposed on the moving end member for following the action of the moving end member
- the lever further comprises an arc extinguishing chamber having an operating handle and an auxiliary static contact disposed on the forward and backward moving paths of the auxiliary moving contact, and the auxiliary static contact is connected in parallel with the main stationary contact through the arc extinguishing chamber
- the auxiliary moving contact, the auxiliary static contact and the arc extinguishing chamber are connected to form an auxiliary branch, In parallel with the active contact and the main static contact, during the movement of the active contact
- the active contact and the main static contact are not turned on, but the auxiliary branch has been turned on, and the arc generated during the closing will be extinguished in the arc extinguishing chamber.
- the potential between the main static contacts is the same, the active contact continues to move, and the active contact is in contact with the main static contact.
- the arc is generated when the active contact and the main static contact are closed, and then The auxiliary moving contact and the auxiliary static contact are separated, so that the auxiliary branch is disconnected, and the arc extinguishing chamber is prevented from being in a long-term flow state, thereby completing the closing; in the opening process, the active contact and the main static contact Before the separation, the auxiliary moving contact and the auxiliary static contact are first contacted, thereby ensuring the auxiliary branch flow when the active contact and the main static contact are separated, and avoiding the arc in the active contact and the main static contact.
- the main The contacts are separated, and the arc extinguishing chamber is opened after the active contact and the main static contact are separated.
- the arc is generated and extinguished in the arc extinguishing chamber, the auxiliary branch is disconnected, and finally the auxiliary moving contact and the auxiliary static contact are opened. Separate and complete the opening action.
- the auxiliary branch is ensured to be connected before the active contact and the main static contact are connected, and the arc is extinguished in the arc extinguishing chamber.
- the active contact and the main static contact are separated before the separation.
- the branch is first connected to avoid arcing between the active contact and the main static contact, and then the arc extinguishing chamber is opened, and the arc is extinguished in the arc extinguishing chamber, so that the isolating switch can have an auxiliary arc extinguishing circuit to satisfy the arc extinguishing
- the requirements have a certain ability to extinguish the arc.
- FIG. 1 is a schematic structural view of a high voltage DC isolation switch in the prior art
- FIG. 2 is a schematic view showing an assembly structure of a DC isolation switch capable of opening and closing a harmonic current according to an embodiment of the present invention
- Figure 3 is a schematic view showing the assembled structure of the closing state of Figure 2;
- Figure 4 is a schematic view showing the assembly structure of the vacuum interrupter, the spring mechanism, the operating handle and the auxiliary static contact of Figure 2;
- Figure 5 is a schematic structural view of the shift lever and the auxiliary movable contact of Figure 2;
- FIG. 6 is a timing diagram of a DC isolation switch closing process capable of opening and closing a harmonic current according to an embodiment of the present invention
- FIG. 7 is a timing diagram of a DC isolation switch opening process capable of opening and closing a harmonic current according to an embodiment of the present invention
- FIG. 8 is a schematic structural view of an arc extinguishing device in a closing state of a DC disconnecting switch capable of opening and closing a harmonic current according to an embodiment of the present invention.
- the DC isolation switch is a horizontally-type DC isolation switch, which includes a main static contact 11 and moves forward.
- the active contact 12 which is closed with the main stationary contact 11 and moves rearwardly to the main stationary contact 11, the active contact 12 and the two foldable conductive rods 13 connected at the rear end thereof constitute a moving end member.
- the main static contact 11 is mounted on the static contact 18, and the active contact 12 is mounted on the movable contact 19, and the static contact 18 is provided with a vacuum connected to the main static contact 11 through the L-shaped connecting plate 4.
- Interrupter chamber 3 is a horizontally-type DC isolation switch, which includes a main static contact 11 and moves forward.
- the main static contact 11 is mounted on the static contact 18, and the active contact 12 is mounted on the movable contact 19, and the static contact 18 is provided with a
- the vacuum interrupter 3 is solid-sealed in the solid-sealed pole, and the DC-isolated switch further includes a vertical insulating support 31 arranged side by side with the solid-sealed pole, and the lower end of the solid-sealed pole and the vertical insulating support 31 are disposed at On the connecting plate 4, the spring mechanism 1 of the vacuum interrupter 3 is laterally disposed at the upper ends of the solid-sealed poles and the vertical insulating support members 31, simplifying the assembly structure.
- An auxiliary contact bracket is further connected to the upper end of the solid-sealed pole and the vertical insulating support 31, and an auxiliary static contact 2 is disposed on the right side surface of the auxiliary contact bracket, and a control spring is disposed on the right side surface of the spring mechanism 1.
- the operating handle of the mechanism 1 controls the spring mechanism by the operating handle to realize the opening and closing of the vacuum interrupter; the spring mechanism 1 and the auxiliary static contact 2 are disposed on the same side to facilitate the movement of the active contact 12 to assist the dynamic touch
- the movement path of the head and the lever is better to achieve the action of contact separation, which is convenient for observation.
- the operating handle includes a shank 6 extending in the left-right direction of the swing axis and a dial 5 disposed on the shank 6.
- the position of the dial 5 relative to the shank 6 in the front-rear direction is adjustable through the dial 5 of the adjustable position.
- the opening and closing time of the vacuum interrupter can be adjusted by changing the position of the dial block to meet the motion trajectory of different isolation switches.
- a plurality of realized dials 5 are arranged side by side at intervals on the dial block 5 a adjusting long hole 51 for adjusting the position of the rod, wherein the adjusting long hole 51 is provided with a bolt 52 for fixing the dial 5 to the shank 6, and the connecting block 5 is fixed to the shank 6 by the bolt 52 and the adjusting long hole.
- the position of the dial 5 relative to the shank 6 can be adjusted by tightening the bolts, and the operation is convenient.
- the conductive rod 13 is provided with an auxiliary moving contact 10 which is in sliding contact with the auxiliary static contact 2.
- the auxiliary moving contact 10 has a plate-shaped structure, and one side of the plate is used for front and rear with the auxiliary fixed contact 2.
- the movable contact contact surface 17 of the sliding contact direction, at the same time, the auxiliary static contact 2 has a static contact contact surface 21, and the static contact contact surface 21 is gradually inclined downward from the front to the front for the dynamic contact
- the head contact surface 17 is slidably contacted in the front-rear direction, and the surface contact can ensure the length of time that the auxiliary movable contact 10 and the auxiliary static contact 2 are in contact with each other, and the auxiliary movable contact 10 and the auxiliary are ensured before the vacuum interrupter 3 is closed.
- the stationary contact 2 remains in contact all the time, making the contact reliable.
- a conductive rod 13 is arranged on the conductive rod 13 for urging the dial 5 to control the spring mechanism 1.
- the lever 9 and the auxiliary moving contact 10 are fixed on a hoop, and the lever 9 and the auxiliary movable contact are arranged.
- the head 10 is vertically disposed on the hoop in a cross structure, and the hoop is formed by the large hoop 8 and the small hoop 7 , and the hoop is fixed on the conductive rod 13 by the bolt 16 , and the auxiliary movable contact 10 and the lever 9 are provided. It is fixed on the conductive rod by the hoop, and the fixing form is simple and reliable. It can adapt to a certain form of conductive rod by adjusting the bolt on the hoop, and has certain versatility.
- the dial block 5 has a front dialing surface 54 and a rear dialing surface 53 for contacting the lever 9 to be moved by the lever 9, and the front dialing surface and the rear dialing surface are located on adjacent sides of the dial block.
- the front dialing surface and the rear dialing surface are arranged in a V shape. Since the active contact 12 has a top to bottom moving path, the front dialing surface 54 is a rear side of the dial block 5, and the rear dialing surface 53 is provided. For the lower side of the dial 5, the V-shaped arrangement is satisfied, and the length of the front dialing surface 54 is greater than the length of the rear dialing surface 53 to ensure the movement of the active contact 12 while ensuring that the dial can be toggled. The front and rear toggle strokes of the dial block 5 are consistent.
- the lever 9 and the auxiliary movable contact 10 are mounted on the conductive rod 13 through the hoop, and the movement track of the active contact 12 during the opening and closing process ensures that the movement track B of the lever 9 can satisfy the dialing of the dial block 5.
- the moving track A of the auxiliary moving contact 10 can in turn be in sliding contact with the auxiliary fixed contact 2.
- the lever 9 and the auxiliary moving contact 10 mounted on the active contact will cause the lever 9 to move the dial 5 according to the movement track of the active contact 12, and can be
- the movement track of the active contact 12 of different DC disconnecting switches adjusts the position of the dial block 5 to change the position of the operating handle being turned to realize the position of the vacuum interrupter opening and closing, so that the auxiliary moving contact 10 and the lever 9 follow
- the auxiliary moving contact 10 and the auxiliary static contact 2 are contacted by the operating lever of the lever 9 to realize the contact before the vacuum interrupter 3 is closed, and then the active contact 12 and the main static contact 11 are After the contact, the vacuum interrupter 3 is closed before the active contact 12 and the main static contact 11 are contacted; the auxiliary movable contact 10 and the auxiliary static contact 2 are contacted before the active contact 12 and the main fixed contact 11 are separated.
- the vacuum interrupter 3 on the auxiliary contact holder 14 is in the opening position, and the active contact 12 moves to the main static contact 11 through the movement track fixed by the active contact 12, and the auxiliary movement
- the contact 10 is in contact with the active contact 12 before the auxiliary static contact 2, at which time the vacuum interrupter 3 is in the open state; the active contact 12 continues to move forward, and the lever 9 is slidably mounted on the right side of the spring mechanism 1
- the operating handle causes the vacuum interrupter 3 to reach the closing state.
- the auxiliary moving contact 10 and the auxiliary static contact 2 and the vacuum interrupter are already When the switch is turned on, the arc vacuum interrupter 3 is extinguished, and the potential between the active contact 12 and the main static contact 11 is the same; the active contact 12 continues to move forward to contact the main static contact 11, and then assists The movable contact 10 and the auxiliary static contact 2 are separated, so that the auxiliary branch is disconnected, and the vacuum interrupter 3 is prevented from passing current for a long time, and the arc-breaking process is used to achieve arc extinguishing during the closing process of the DC isolation switch. During the process, the vacuum interrupter is always in the closed state.
- the opening process of the DC isolating switch the active contact 12 moves backward, so that the auxiliary moving contact 10 and the auxiliary static contact 2 are re-contacted from the separated state, and the auxiliary branch is turned on; the active contact 12 continues to move backward and the main The static contact 11 is separated, but the entire circuit is turned on by the auxiliary branch, the active contact 12 continues to move backward, and the lever 9 is moved to operate the handle, so that the vacuum interrupter 3 is opened, and the brake is produced when the brake is opened.
- the generated arc is extinguished by the vacuum interrupter 3, the auxiliary branch is disconnected; the active contact 12 continues to move, and the auxiliary moving contact 10 and the auxiliary fixed contact 2 are separated, and the entire opening process is completed after the opening position.
- the operating lever is plucked, and the operating lever is just started to move the operating lever to enable the vacuum interrupter to be opened and closed.
- the vacuum interrupter can be closed during the process of the toggle handle, so that during the opening and closing process, the auxiliary movable contact and the auxiliary static contact can be set to be dialed simultaneously.
- the lever is operated by the lever, and the auxiliary movable contact and the auxiliary static contact are re-contacted after the lever starts to contact and the operating handle is turned to meet the sliding contact between the auxiliary movable contact and the auxiliary fixed contact.
- the vacuum interrupter can be closed and closed.
- the DC isolation switch of the embodiment of the invention can be applied to the high voltage side of the DC filter of the DC field. Since the DC filter current is different from the normal current, the frequency is relatively high, and the currents of the respective frequencies are included, and the change speed thereof Faster, through the vacuum interrupter in the arc extinguishing device, according to different harmonic current frequency, recovery voltage, steady current, closing current, breaking current, choose different types of vacuum interrupter, harmonic The current is switched off to make it electrically switch the DC filter, which has the ability to open and close the harmonic current, and meet the requirements of the DC field filter on the high side of the DC field filter.
- the arc extinguishing chamber may be configured as another type of arc extinguishing chamber, such as filling an arc extinguishing gas such as sulfur hexafluoride SF 6 in the arc extinguishing chamber; the arc extinguishing device is applied not only to the horizontal telescopic type
- the DC isolating switch can also be applied to a direct-acting isolating switch such as a moving contact driven by a screw nut mechanism; the lever can be arranged not in the radial direction of the conductive rod, and the auxiliary moving contact is inclined to each other, or parallel to The plane of the conductive rod in the axial direction is perpendicular to the auxiliary moving contact; the auxiliary moving contact may be arranged in other structural forms other than the plate-shaped structure, such as being slidable in contact with the contact surface of the fixed contact.
- the elastic pin and the elastic finger disposed on the conductive rod capable of sliding contact with the contact surface of the static contact; the lever and the auxiliary moving contact can be separately disposed on different hoops; the lever and the auxiliary moving contact are also It can be directly fixed on the conductive rod by welding, riveting and other fixed forms; the contact surface of the static contact can be set horizontally, in the process of contacting the auxiliary moving contact with the auxiliary static contact, the arc extinguishing chamber is closed and closed. And auxiliary The contact and the auxiliary static contact are separated after the contact of the active contact and the main static contact, and can be separated after the arc extinguishing chamber is opened; the dial can be omitted on the handle, and the dial is replaced by changing the handle of different sizes.
- the operation time of the handle; the position adjustment structure between the dial block and the shank may be a single long hole strip; the front dialing surface and the rear dialing surface may be disposed on opposite sides of the dial block; the length of the front dialing surface It may be no longer than the length of the rear dialing surface, so that the positions of the front dialing surface and the rear dialing surface of the dial block are all on the movement track of the lever; the arc extinguishing chamber may not be disposed in the solid sealing pole;
- the device may also be installed on the static contact seat through the connecting bracket without the insulating support member; the spring mechanism of the arc extinguishing chamber may be disposed on the insulating support member or the arc extinguishing chamber; the auxiliary static contact may be directly disposed on the spring mechanism;
- the auxiliary static contact and the operating handle may not be disposed on the same side, for example, the auxiliary static contact is disposed on the upper side of the auxiliary contact bracket, the operating handle is located on the right side of the spring
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
本发明涉及一种可开合谐波电流的直流隔离开关，直流隔离开关包括主静触头、动端部件和灭弧装置，灭弧装置包括具有操作柄的灭弧室和设置在主动触头的前后移动路径上的辅助静触头，辅助静触头通过灭弧室与主静触头并联，灭弧装置还包括设置于动端部件上的随动端部件动作的辅助动触头和拨杆，辅助动触头、拨杆随动端部件前后移动过程中，辅助动触头、辅助静触头于拨杆拨动操作柄实现灭弧室合闸之前接触，后于主动触头、主静触头接触后分离，灭弧室于主动触头触前、主静触头接合闸；辅助动触头、辅助静触头于主动触头、主静触头分离前接触，于拨杆拨动操作柄实现灭弧室分闸之后分离，灭弧室于主动触头、主静触头分离后分闸。
Description
相关申请的交叉引用
本申请基于申请号为201710590732.4、申请日为2017年07月19日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此以全文引入的方式引入本申请。
本发明实施例涉及高压输电领域中的一种可开合谐波电流的直流隔离开关。
作为空气断口的直流隔离开关，其具体结构如图1所示：包括主静触头11和具有主动触头12的动端部件，动端部件还包括两个可相互折叠的用于带动主动触头往复移动的导电杆13，在合闸时，操动机构驱动两个导电杆13展开，主动触头在导电杆带动下与主静触头合闸；在分闸时，操动机构驱动两个导电杆13折叠收起，主动触头在导电杆带动下与主静触头分闸。现有高压直流隔离开关的主要作用是在无负载条件下对高压电器设备提供电气隔离，因此直流隔离开关不具备开断电流的能力。但是安装在直流滤波器高压侧的直流隔离开关，要求其具备开断谐波电流的能力，使直流滤波器可以带电投切。目前，国内外的直流隔离开关开合谐波电流一般采用的是辅助招弧角装置，在直流隔离开关上安装引弧装置，在开断谐波电流时，谐波电流烧蚀辅助触头形成电弧，通过空气拉断电弧来开合谐波电流。
而特高压直流输电工程的输送距离今后将大幅提升，为了更好地配置
资源，提高输送效率和线路的利用率，提高输送容量是比较经济的方法，增大系统的额定电流或提高系统电压，将会有效地提高输送功率。随着直流容量的提升，对于安装在滤波器高压侧的直流隔离开关，其开断的谐波电流必然也随之增大，现有技术中的辅助招弧角装置已无法满足开合谐波电流的要求。因此，需要设计一种在电流增大时，能够保证隔离开关具有开断谐波电流能力的装置。
发明内容
为解决上述技术问题，本发明实施例期望提供一种有辅助灭弧回路的插入式的可开合谐波电流的直流隔离开关。
本发明实施例的可开合谐波电流的直流隔离开关的技术方案如下：
可开合谐波电流的直流隔离开关，包括主静触头和动端部件，动端部件包括通过朝前运动而与主静触头合闸、朝后运动而与主静触头分闸的主动触头，隔离开关还包括灭弧装置，灭弧装置包括设置于所述动端部件上的用于随动端部件动作的辅助动触头和拨杆，灭弧装置还包括具有操作柄的灭弧室和设置在辅助动触头的前后移动路径上的辅助静触头，辅助静触头通过所述灭弧室与主静触头并联，辅助动触头、拨杆随动端部件前后移动过程中，辅助动触头、辅助静触头于拨杆拨动操作柄实现灭弧室合闸之前接触，于主动触头、主静触头接触后分离，灭弧室于主动触头、主静触头接触前合闸；辅助动触头、辅助静触头于主动触头、主静触头分离前接触，于拨杆拨动操作柄实现灭弧室分闸之后分离，灭弧室于主动触头、主静触头分离后分闸。
动端部件还包括带动所述主动触头移动的导电杆，拨杆沿导电杆的径向布置，辅助动触头为与所述拨杆垂直或倾斜设置的板形结构，辅助动触头的一侧板面为用于与辅助静触头沿前后方向滑移接触的动触头接触面。
拨杆和辅助动触头均设置于抱箍上，所述抱箍通过紧固件固定于所述
导电杆上。
辅助静触头具有由后至前逐渐朝下倾斜设置的用于与所述动触头接触面沿前后方向滑移接触的静触头接触面。
操作柄包括摆动轴线沿左右方向延伸的柄杆及设置于柄杆上的拨块，拨块具有用于与所述拨杆接触以实现被所述拨杆拨动的前拨动面和后拨动面，拨块相对柄杆在前后方向的位置可调。
拨块上间隔并列布置有多个实现拨块相对柄杆位置调节的调节长孔，调节长孔中设置有实现将拨块固定于柄杆上的螺栓。
前拨动面、后拨动面位于拨块的相邻侧面上，且前拨动面、后拨动面呈V形布置。
前拨动面由拨块的后侧面形成，后拨动面由拨块的下侧面形成，前拨动面的长度大于后拨动面的长度。
灭弧室固封于固封极柱中，隔离开关还包括与所述固封极柱间隔并列布置的竖向绝缘支撑件，固封极柱与竖向绝缘支撑件的下端设置于连接架上，灭弧室的弹簧机构横向设置于固封极柱和竖向绝缘支撑件的上端。
固封极柱和竖向绝缘支撑件的上端连接有辅助触头支架，辅助静触头设置于辅助触头支架的右侧，操作柄位于弹簧机构的右侧。
本发明实施例的有益效果是：
相比于现有技术，本发明实施例所涉及的可开合谐波电流的直流隔离开关包括主静触头和动端部件，动端部件包括通过朝前运动而与主静触头合闸、朝后运动而与主静触头分闸的主动触头，隔离开关还包括灭弧装置，灭弧装置包括设置于所述动端部件上的用于随动端部件动作的辅助动触头和拨杆，灭弧装置还包括具有操作柄的灭弧室和设置在辅助动触头的前后移动路径上的辅助静触头，辅助静触头通过所述灭弧室与主静触头并联，在实际的操作中，辅助动触头、辅助静触头和灭弧室接通后构成辅助支路，
与主动触头、主静触头并联，主动触头向主静触头移动过程中，辅助静触头与辅助动触头先接触，此时灭弧室处于分闸状态，主动触头继续运动使灭弧室合闸，此时主动触头与主静触头并未导通，但辅助支路已经导通，合闸时产生的电弧会在灭弧室中被熄灭，此时主动触头、主静触头之间的电势相同，主动触头继续运动，主动触头与主静触头接触，由于电势相同，避免了主动触头、主静触头合闸时产生电弧的情况，随后辅助动触头、辅助静触头分离，使得辅助支路断开，避免了灭弧室处于长时间的通流状态，至此完成合闸；在分闸过程中，主动触头、主静触头分离之前，辅助动触头、辅助静触头先接触，由此可保证在主动触头、主静触头分离时，辅助支路通流，避免了电弧在主动触头、主静触头之间产生，随着主动触头的向后移动，主动触头、主静触头分离，灭弧室在主动触头、主静触头分离后分闸，此时电弧在灭弧室中产生并被熄灭，辅助支路断开，最后辅助动触头、辅助静触头分离，完成分闸动作。合闸的过程中，保证主动触头与主静触头接通前辅助支路先接通并将电弧在灭弧室中熄灭，分闸过程中保证主动触头、主静触头分离前辅助支路先接通，避免电弧产生在主动触头、主静触头之间，继而灭弧室分闸，电弧在灭弧室中被熄灭，使得隔离开关能够具有辅助灭弧回路，满足灭弧的要求，具备一定的灭弧能力。
图1为现有技术中的高压直流隔离开关结构示意图；
图2为本发明可开合谐波电流的直流隔离开关具体实施例分闸状态的装配结构示意图；
图3为图2的合闸状态装配结构示意图；
图4为图2中真空灭弧室、弹簧机构、操作柄与辅助静触头装配结构示意图；
图5为图2中的拨杆与辅助动触头的结构示意图；
图6为本发明实施例可开合谐波电流的直流隔离开关合闸过程时序图；
图7为本发明实施例可开合谐波电流的直流隔离开关分闸过程时序图；
图8为本发明实施例可开合谐波电流的直流隔离开关的合闸状态的灭弧装置的结构示意图。
下面结合附图对本发明的实施方式作进一步说明。
本发明的可开合谐波电流的直流隔离开关的具体实施例，如图2至图8所示，该直流隔离开关为水平伸缩式直流隔离开关，其包括主静触头11，朝前运动与主静触头11合闸、朝后运动与主静触头11分闸的主动触头12，主动触头12与连接在其后端的两个可折叠的导电杆13构成了动端部件。主静触头11安装在静触座18上，主动触头12安装在动触座19上，在静触座18上设置有通过L形的连接板4并联于主静触头11上的真空灭弧室3。
真空灭弧室3固封于固封极柱中，直流隔离开关还包括与固封极柱间隔并列布置的竖向绝缘支撑件31，固封极柱和竖向绝缘支撑件31的下端设置在连接板4上，真空灭弧室3的弹簧机构1横向设置在固封极柱和竖向绝缘支撑件31的上端，简化了装配结构。固封极柱和竖向绝缘支撑件31的上端还连接有辅助触头支架，辅助触头支架的右侧面上设置有辅助静触头2，弹簧机构1的右侧面上设置有控制弹簧机构1的操作柄，通过操作柄控制弹簧机构以实现对真空灭弧室的分合闸；弹簧机构1和辅助静触头2设置在同侧能够方便主动触头12的移动过程中辅助动触头和拨杆的运动轨迹更好地实现接触分离的动作，便于观察。操作柄包括摆动轴线沿左右方向延伸的柄杆6和设置在柄杆6上的拨块5，拨块5相对于柄杆6在前后方向的位置可调，通过可调节位置的拨块5来实现对于具有不同运动轨迹的拨杆均能通过改变拨块的位置来调节真空灭弧室的分合闸时间，满足不同隔离开关的运动轨迹。在拨块5上间隔并列布置有多个实现拨块5相对柄
杆位置调节的调节长孔51，调节长孔51中设置有实现将拨块5固定于柄杆6上的螺栓52，通过螺栓52与调节长孔配合将拨块5固定在柄杆6上，通过松紧螺栓即可调节拨块5相对于柄杆6的位置，操作方便。
导电杆13上设置有与辅助静触头2滑移接触导通的辅助动触头10，辅助动触头10为板形结构，其一侧板面为用于与辅助静触头2沿前后方向滑移接触的动触头接触面17，与此同时，辅助静触头2具有静触头接触面21，静触头接触面21由后至前逐渐朝下倾斜设置，用于与动触头接触面17沿前后方向滑移接触，面接触可保证辅助动触头10与辅助静触头2相互接触的时长，保证在真空灭弧室3分合闸之前，辅助动触头10与辅助静触头2一直保持接触，使得接触可靠。导电杆13上沿径向布置有用于拨动拨块5以控制弹簧机构1的拨杆9，拨杆9与辅助动触头10均固定在一抱箍上，且拨杆9和辅助动触头10呈十字结构相互垂直设置在抱箍上，该抱箍由大抱箍8和小抱箍7合围形成，抱箍通过螺栓16固定在导电杆13上，辅助动触头10和拨杆9通过抱箍固定在导电杆上，固定形式简单可靠，能够通过调节抱箍上的螺栓来适应一定形式的导电杆，具有一定的通用性。
拨块5具有用于与拨杆9接触以实现被拨杆9拨动的前拨动面54和后拨动面53，且前拨动面、后拨动面位于拨块的相邻侧面上，前拨动面、后拨动面呈V形布置，由于主动触头12具有由上至下的运动路径，所述设置前拨动面54为拨块5的后侧面，后拨动面53为拨块5的下侧面，满足V形布置，前拨动面54的长度大于后拨动面53的长度，在保证拨块能够被拨动的同时，又能够在主动触头12的运动轨迹上实现拨块5的前后拨动行程一致。
拨杆9和辅助动触头10通过抱箍安装在导电杆13上，通过主动触头12在分合闸过程中的运动轨迹来保证拨杆9的运动轨迹B能够满足对拨块5的拨动，辅助动触头10的运动轨迹A又能与辅助静触头2滑移接触。在
直流隔离开关进行分合闸的操作时，安装在主动触头上的拨杆9和辅助动触头10会根据主动触头12的运动轨迹，使得拨杆9拨动拨块5，且能够根据不同的直流隔离开关的主动触头12的运动轨迹，调节拨块5的位置来改变操作柄的被拨动实现真空灭弧室分合闸的位置，使得辅助动触头10、拨杆9随导电杆13前后移动过程中，辅助动触头10、辅助静触头2于拨杆9拨动操作柄实现真空灭弧室3合闸之前接触，后于主动触头12、主静触头11接触后分离，真空灭弧室3于主动触头12、主静触头11接触前合闸；辅助动触头10、辅助静触头2于主动触头12、主静触头11分离前接触，于拨杆9拨动操作柄实现真空灭弧室3分闸之后分离，真空灭弧室于主动触头12、主静触头11分离后分闸。
在直流隔离开关合闸的过程中，辅助触头支架14上的真空灭弧室3处于分闸位置，主动触头12通过主动触头12固定的运动轨迹向主静触头11移动，辅助动触头10先于辅助静触头2与主动触头12接触，此时真空灭弧室3处于分闸状态；主动触头12继续向前运动，拨杆9拨动安装在弹簧机构1右侧的操作柄，使得真空灭弧室3达到合闸状态，此时主动触头12、主静触头11虽然未接触，但是辅助动触头10和辅助静触头2和真空灭弧室均已经导通，合闸时产生的电弧真空灭弧室3中熄灭，主动触头12、主静触头11间的电势相同；主动触头12继续向前运动与主静触头11接触，继而辅助动触头10、辅助静触头2分开，从而使得辅助支路断开，避免真空灭弧室3长时间的带电流通，以此开断时序实现直流隔离开关合闸过程中的灭弧，此过程中真空灭弧室一直处于合闸状态。
直流隔离开关的分闸过程：主动触头12向后运动，使得辅助动触头10与辅助静触头2从分离状态重新接触，辅助支路导通；主动触头12继续向后运动与主静触头11分离，但整个回路通过辅助支路导通，主动触头12继续向后运动，拨杆9拨动操作柄，使得真空灭弧室3分闸，将分闸时产
生的电弧通过真空灭弧室3进行熄灭，辅助支路断开；主动触头12继续运动，将辅助动触头10和辅助静触头2分离，至分闸位置后整个分闸过程结束。
在本实施例中，辅助动触头与辅助静触头接触后，拨杆才拨动操作柄，且拨杆刚开始拨动操作柄即可使真空灭弧室能够实现分合闸，在其他实施例中，可在拨杆在拨动操作柄的过程中使真空灭弧室分合闸，因此，在分合闸过程中，可设置在辅助动触头和辅助静触头接触的同时拨杆拨动操作柄，也可设置在拨杆开始接触并拨动操作柄之后辅助动触头和辅助静触头再接触，满足在辅助动触头与辅助静触头相互滑移接触的过程中真空灭弧室分合闸即可。
本发明实施例的直流隔离开关可应用于直流场的直流滤波器的高压侧，由于直流滤波电流和普通的电流不一样，其频率比较高，且包含的各个频率的电流都有，其变化速度比较快，可通过灭弧装置中的真空灭弧室根据不同的谐波电流的频率、恢复电压、稳态电流、合闸电流、开断电流，选择不同类型的真空灭弧室，对谐波电流进行开断，使其带电投切直流滤波器，具备能够开合谐波电流的能力，满足直流场滤波器高压侧直流隔离开关的要求。
在本发明的其他具体实施例中，灭弧室可以设置为其他形式的灭弧室如在灭弧室填充灭弧气体如六氟化硫SF6等；该灭弧装置除了应用于水平伸缩式直流隔离开关外，还可应用于如动触头由丝杆螺母机构驱动的直动式隔离开关上；拨杆可不沿导电杆的径向布置，与辅助动触头相互倾斜，或者是平行于导电杆的轴线方向的平面上与辅助动触头相互垂直设置；辅助动触头可以设置为除板形结构外的其他结构形式，如可设置为能够在静触头接触面上滑移接触的弹性针，及设置在导电杆上能够与静触头接触面滑移接触的弹性触指等；拨杆和辅助动触头可分开设置在不同的抱箍上；拨
杆和辅助动触头也可通过焊接、铆接等其他固定形式直接固定在导电杆上；静触头接触面可设置为水平的，满足在辅助动触头与辅助静触头接触的过程中，灭弧室分合闸，且辅助动触头、辅助静触头满足在主动触头、主静触头接触之后分离，在灭弧室分闸之后分离即可；柄杆上可不设置拨块，通过更换不同尺寸的柄杆来实现拨动操作柄的时间；拨块和柄杆之间的位置调节的结构可以为单个长孔条；前拨动面、后拨动面可设置在拨块的相对两侧；前拨动面的长度可不大于后拨动面的长度，保证拨块的前拨动面、后拨动面的位置均处在拨杆的运动轨迹上即可；灭弧室可不设置在固封极柱中；灭弧装置也可不设置绝缘支撑件，直接通过连接架安装在静触座上；灭弧室的弹簧机构可设置在绝缘支撑件上或灭弧室上；辅助静触头可以直接设置在弹簧机构上；辅助静触头和操作柄可不设置在同侧，如辅助静触头设置在辅助触头支架的上侧，操作柄位于弹簧结构的右侧，将主动触头从辅助支架内穿过，通过十字结构布置的辅助动触头和拨杆分别实现对辅助静触头和操作柄的相应动作；可将辅助动触头和拨杆沿导电杆的径向相背设置，相应的将辅助静触头和操作柄设置在相对两侧；也可将辅助动触头和拨杆在导电杆的外周面上沿轴线方向前后设置，同时将辅助静触头和操作柄的前后位置关系对应调节。
Claims (10)
- 一种可开合谐波电流的直流隔离开关，包括主静触头和动端部件，动端部件包括通过朝前运动而与主静触头合闸、朝后运动而与主静触头分闸的主动触头，所述直流隔离开关还包括灭弧装置，灭弧装置包括设置于所述动端部件上的用于随动端部件动作的辅助动触头和拨杆，灭弧装置还包括具有操作柄的灭弧室和设置在辅助动触头的前后移动路径上的辅助静触头，辅助静触头通过所述灭弧室与主静触头并联，辅助动触头、拨杆随动端部件前后移动过程中，辅助动触头、辅助静触头于拨杆拨动操作柄实现灭弧室合闸之前接触，辅助动触头、辅助静触头于主动触头、主静触头接触后分离，灭弧室于主动触头、主静触头接触前合闸；辅助动触头、辅助静触头于主动触头、主静触头分离前接触，辅助动触头、辅助静触头于拨杆拨动操作柄实现灭弧室分闸之后分离，灭弧室于主动触头、主静触头分离后分闸。
- 根据权利要求1所述的可开合谐波电流的直流隔离开关，其中，动端部件还包括带动所述主动触头移动的导电杆，拨杆沿导电杆的径向布置，辅助动触头为与所述拨杆垂直或倾斜设置的板形结构，辅助动触头的一侧板面为用于与辅助静触头沿前后方向滑移接触的动触头接触面。
- 根据权利要求2所述的可开合谐波电流的直流隔离开关，其中，拨杆和辅助动触头均设置于抱箍上，所述抱箍通过紧固件固定于所述导电杆上。
- 根据权利要求2所述的可开合谐波电流的直流隔离开关，其中，所述辅助静触头具有由后至前逐渐朝下倾斜设置的用于与所述动触头接触面沿前后方向滑移接触的静触头接触面。
- 根据权利要求1所述的可开合谐波电流的直流隔离开关，其中，操作柄包括摆动轴线沿左右方向延伸的柄杆及设置于柄杆上的拨块，拨块具 有用于与所述拨杆接触以实现被所述拨杆拨动的前拨动面和后拨动面，拨块相对柄杆在前后方向的位置可调。
- 根据权利要求5所述的可开合谐波电流的直流隔离开关，其中，拨块上间隔并列布置有多个实现拨块相对柄杆位置调节的调节长孔，调节长孔中设置有实现将拨块固定于柄杆上的螺栓。
- 根据权利要求5所述的可开合谐波电流的直流隔离开关，其中，前拨动面、后拨动面位于拨块的相邻侧面上，且前拨动面、后拨动面呈V形布置。
- 根据权利要求7所述的可开合谐波电流的直流隔离开关，其中，前拨动面由拨块的后侧面形成，后拨动面由拨块的下侧面形成，前拨动面的长度大于后拨动面的长度。
- 根据权利要求1至8任一项所述的可开合谐波电流的直流隔离开关，其中，灭弧室固封于固封极柱中，隔离开关还包括与所述固封极柱间隔并列布置的竖向绝缘支撑件，固封极柱与竖向绝缘支撑件的下端设置于连接架上，灭弧室的弹簧机构横向设置于固封极柱和竖向绝缘支撑件的上端。
- 根据权利要求9所述的可开合谐波电流的直流隔离开关，其中，固封极柱和竖向绝缘支撑件的上端连接有辅助触头支架，辅助静触头设置于辅助触头支架的右侧，操作柄位于弹簧机构的右侧。
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| CN105023793A (zh) * | 2015-06-26 | 2015-11-04 | 中国西电电气股份有限公司 | 一种特高压直流隔离开关的导电结构 |
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